Influence Caused by Harmonic and Filtering Methods of Synchronous Generator in Short-capacity System

Chunming Wang, Cong Pan, Jingjing Chen, Pengchao Song, Jian-ke Li

Engineering Institute of Engineering Corps, PLA University of Science and Technology, Nanjing, China.

DOI: 10.4236/epe.2013.54B206                

Abstract

Relative to the power grid, the short-capacity system has smaller inertia and weaker ability to bear disturbance. As a result, the synchronous generator in short-capacity system will be greatly influenced by harmonic. To reveal how harmonic influence the generator, this article analyzed how harmonic current will influence the output voltage. Deduced a formula that can describe the electromagnetic torque pulsation brought by the theory of Instantaneous Power, which can explain why generator’s shaft vibrates. Then this article evaluated the applicability of current filtering methods in view of characteristics of the small capacity of the system. As a result, it was demonstrated that active filtering method is best suited for small capacity system. At last, it conducted the experiment that diesel generator set supply power to non-liner load to demonstrate the conclusion of theoretical analysis.

Keywords

Short-capacity System; Synchronous Generator; Harmonic; Instantaneous Power; Active Filtering

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. H. Shuai, R. An and S. Shi, “Injection Type Hybrid Active Power Filter,” Journal of Electric Power Science and Technology, Vol. 23, No. 1, 2008, pp. 43-49.
[2]	L. F. Luo, L. X. Lan, Y. Li, et al., “Rotary Motor’s Influences by Harmonics in the Novel DC Transmission System,” Proceedings of the CSU-EPSA, Vol. 22, No. 1, 2010, pp. 48-53.
[3]	J. L. Li, J. Q. Wang and W. Y. Jin, “A Power Factor Correction Technology for Short-capacity System,” Electric Power Automation Equipment, Vol. 31, No. 1, 2011, pp. 59-62.
[4]	X. D. Liu and J. G. Jiang. “Harmonic Impact on the Synchronous Generator,” Electric Engineering, Vol. 03, 1997, pp. 8-12.
[5]	De La Rosa F, “Harmonics and Power Systems,” Beijing: Machinery Industry Press, 2009.
[6]	J. W. George, “Power Systems Harmonics Fundamental, Analysis and Filter Design,” Beijing: Machinery Industry Press, 2007.
[7]	X. H. Wang and K. L. Lo, “New Development of Torque Analysis of Synchronous Machine,” Electric Machines and Power Systems, Vol. 25, No. 8, 1997, pp. 827-838.
[8]	A. Hirofmi, H. W. Edson and A. Mauricio, “Instantaneous Power Theory and Application Power Condition,” Beijing: Machinery Industry Press, 2009.
[9]	Z. Wang, J. Yang, J. J. Liu and Y. Wang, “Harmonic Suppression and Reactive Power Compensation,” second edition, Machinery Industry Press, 2005.
[10]	P. T. Cheng, S. Bhattcharya and D. Divan, “Experimental Verrification of Dominant Harmonic Active Filter for High-Power Applications,” IEEE Trans. on IA. Vol. 36, No. 2, 2000, pp. 567-57
[11]	X. J. Liang, “Power system Harmonic and Rejection Techniques,” Guangxi University, 2007.